This Protektor Deluxe Double Stitched Rear Shooting Rest Bag has a bottom comprised of 3 layers of stiff leather with an integral doughnut that eliminates any rocking movement. The sidewalls have stiffer leather than most bags, which prevents "rounding" of the bag over time. Bunny ear models have "v-style" ears and are a great choice for those with cheek pieces or thinner rear stock profiles. This is an incredibly stable bag that provides years of service.